number_format

名称:number_format

分类:字符串

所属语言:php

一句话介绍:以千位分组来格式化数字。

实例

例子 1

格式化数字：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token keyword">echo</span> <span class="token function">number_format</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"5000000"</span><span class="token punctuation">)</span><span class="token operator">.</span><span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">number_format</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"5000000"</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">)</span><span class="token operator">.</span><span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token function">number_format</span><span class="token punctuation">(</span><span class="token string double-quoted-string">"5000000"</span><span class="token punctuation">,</span><span class="token number">2</span><span class="token punctuation">,</span><span class="token string double-quoted-string">","</span><span class="token punctuation">,</span><span class="token string double-quoted-string">"."</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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例子 2

您希望返回一个价格：一个参数将对数字进行舍入（格式化为不带小数位），两个参数给出您想要的结果：

<span class="token php language-php"><span class="token delimiter important"><?php</span>
<span class="token variable">$num</span> <span class="token operator">=</span> <span class="token number">4999.9</span><span class="token punctuation">;</span>
<span class="token variable">$formattedNum</span> <span class="token operator">=</span> <span class="token function">number_format</span><span class="token punctuation">(</span><span class="token variable">$num</span><span class="token punctuation">)</span><span class="token operator">.</span><span class="token string double-quoted-string">"<br>"</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$formattedNum</span><span class="token punctuation">;</span>
<span class="token variable">$formattedNum</span> <span class="token operator">=</span> <span class="token function">number_format</span><span class="token punctuation">(</span><span class="token variable">$num</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token keyword">echo</span> <span class="token variable">$formattedNum</span><span class="token punctuation">;</span>
<span class="token delimiter important">?></span></span>

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